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freebsd/sys/netatm/uni/unisig_vc_state.c
Jim Pirzyk 03b84cf051 Commited patch for uni signaling fix. 
PR:		kern/28748
Submitted by:	Richard Hodges <rh@matriplex.com>
MFC after:	2 weeks
2001-07-11 16:31:50 +00:00

2254 lines
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/*
*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*
* @(#) $FreeBSD$
*
*/
/*
* ATM Forum UNI 3.0/3.1 Signalling Manager
* ----------------------------------------
*
* VC state machine
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_vc.h>
#include <netatm/atm_sigmgr.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
#include <netatm/uni/unisig_var.h>
#include <netatm/uni/unisig_msg.h>
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#endif
/*
* Local functions
*/
static int unisig_vc_invalid __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act01 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act02 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act03 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act04 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act05 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act06 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act07 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act08 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act09 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act10 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act11 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act12 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act13 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act14 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act15 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act16 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act17 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act18 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act19 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act20 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act21 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act22 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act23 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act24 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act25 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act26 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act27 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act28 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act29 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act30 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_act31 __P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *));
static int unisig_vc_clear_call __P((struct unisig *,
struct unisig_vccb *,
struct unisig_msg *,
int));
/*
* State table
*/
static int unisig_vc_states[21][17] = {
/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */
{ 0, 2, 99, 5, 99, 99, 0, 99, 12, 99, 0, 14, 0, 3, 0, 0, 0 },
{ 29, 4, 99, 17, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 29, 6, 99, 6, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 29, 17, 99, 17, 99, 99, 17, 99, 10, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 8, 17, 99, 17, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 29, 7, 99, 15, 99, 99, 15, 99, 15, 99, 15, 16, 17, 0, 0, 0, 0 },
{ 19, 3, 99, 3, 99, 99, 3, 99, 3, 99, 3, 13, 3, 0, 0, 0, 0 },
{ 21, 21, 99, 21, 99, 99, 21, 99, 21, 99, 21, 21, 21, 0, 0, 0, 0 },
{ 22, 22, 99, 22, 99, 99, 22, 99, 22, 99, 22, 22, 22, 0, 0, 0, 0 },
{ 29, 17, 99, 17, 99, 99, 17, 99, 17, 99, 23, 17, 17, 0, 0, 0, 0 },
{ 29, 17, 99, 17, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 29, 17, 99, 17, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 29, 17, 99, 17, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 29, 17, 99, 17, 99, 99, 17, 99, 17, 99, 17, 17, 17, 0, 0, 0, 0 },
{ 1, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99 },
{ 99, 25, 99, 25, 99, 99, 9, 99, 25, 99, 25, 25, 25, 25, 31, 25, 25 },
{ 99, 25, 99, 25, 99, 99, 11, 99, 25, 99, 25, 25, 25, 25, 19, 25, 25 },
{ 99, 12, 99, 12, 99, 99, 25, 99, 12, 99, 12, 19, 19, 30, 19, 99, 99 },
{ 99, 12, 99, 12, 99, 99, 12, 99, 12, 99, 12, 3, 3, 3, 24, 26, 26 },
{ 99, 3, 99, 3, 99, 99, 30, 99, 3, 99, 18, 3, 3, 0, 19, 27, 19 },
{ 99, 7, 99, 7, 99, 99, 30, 99, 7, 99, 19, 19, 19, 20, 19, 19, 28 }
};
/*
* Action vector
*
* A given state, action pair selects an action number from the
* state table. This vector holds the address of the action routine
* for each action number.
*/
#define MAX_ACTION 32
static int (*unisig_vc_act_vec[MAX_ACTION])
__P((struct unisig *, struct unisig_vccb *,
struct unisig_msg *)) = {
unisig_vc_invalid,
unisig_vc_act01,
unisig_vc_act02,
unisig_vc_act03,
unisig_vc_act04,
unisig_vc_act05,
unisig_vc_act06,
unisig_vc_act07,
unisig_vc_act08,
unisig_vc_act09,
unisig_vc_act10,
unisig_vc_act11,
unisig_vc_act12,
unisig_vc_act13,
unisig_vc_act14,
unisig_vc_act15,
unisig_vc_act16,
unisig_vc_act17,
unisig_vc_act18,
unisig_vc_act19,
unisig_vc_act20,
unisig_vc_act21,
unisig_vc_act22,
unisig_vc_act23,
unisig_vc_act24,
unisig_vc_act25,
unisig_vc_act26,
unisig_vc_act27,
unisig_vc_act28,
unisig_vc_act29,
unisig_vc_act30,
unisig_vc_act31
};
/*
* Process an event on a VC
*
* Arguments:
* usp pointer to the UNISIG instance
* uvp pointer to the VCCB for the affected VCC
* event a numeric indication of which event has occured
* msg pointer to a signalling message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
int
unisig_vc_state(usp, uvp, event, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
int event;
struct unisig_msg *msg;
{
int action, rc, state;
/*
* Select an action from the state table
*/
if (uvp)
state = uvp->uv_sstate;
else
state = UNI_NULL;
action = unisig_vc_states[event][state];
if (action >= MAX_ACTION || action < 0)
panic("unisig_vc_state: invalid action\n");
/*
* Perform the requested action
*/
ATM_DEBUG4("unisig_vc_state: uvp=%p, state=%d, event=%d, action=%d\n",
uvp, state, event, action);
rc = unisig_vc_act_vec[action](usp, uvp, msg);
return(rc);
}
/*
* VC state machine action 0
* Unexpected action - log an error message
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection (may
be null)
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_invalid(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
log(LOG_ERR, "unisig_vc_state: unexpected action\n");
return(EINVAL);
}
/*
* VC state machine action 1
* Setup handler called
*
* Send SETUP, start timer T303, go to UNI_CALL_INITIATED state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act01(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Send the setup message
*/
rc = unisig_send_setup(usp, uvp);
if (rc)
return(rc);
/*
* Set timer T303
*/
uvp->uv_retry = 0;
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T303);
/*
* Set the new state
*/
uvp->uv_sstate = UNI_CALL_INITIATED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
}
/*
* VC state machine action 2
* Timeout while waiting for CALL PROCEEDING or CONNECT
*
* If this is the second expiration, clear the call. Otherwise,
* retransmit the SETUP message and restart T303.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act02(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc = 0;
if (uvp->uv_retry) {
/*
* Clear the call
*/
rc = unisig_clear_vcc(usp, uvp,
T_ATM_CAUSE_NO_ROUTE_TO_DESTINATION);
} else {
uvp->uv_retry++;
(void) unisig_send_setup(usp, uvp);
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T303);
}
return(rc);
}
/*
* VC state machine action 3
*
* Clear the call internally
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act03(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc, cause;
/*
* Set cause code
*/
if ((msg != NULL) && (msg->msg_ie_caus != NULL)) {
unisig_cause_attr_from_ie(&uvp->uv_connvc->cvc_attr,
msg->msg_ie_caus);
cause = T_ATM_ABSENT;
} else
cause = T_ATM_CAUSE_DESTINATION_OUT_OF_ORDER;
/*
* Clear the VCCB
*/
rc = unisig_clear_vcc(usp, uvp, cause);
return(rc);
}
/*
* VC state machine action 4
* Received CALL PROCEEDING
*
* Start timer T310, go to UNI_CALL_OUT_PROC
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act04(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int cause, rc, vpi, vci;
struct atm_pif *pip = usp->us_pif;
struct ie_generic *iep;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Make sure a Connection ID is part of the message
*/
if (msg->msg_ie_cnid) {
vpi = msg->msg_ie_cnid->ie_cnid_vpci;
vci = msg->msg_ie_cnid->ie_cnid_vci;
} else {
iep = (struct ie_generic *)atm_allocate(&unisig_iepool);
if (!iep)
return(ENOMEM);
iep->ie_ident = UNI_IE_CNID;
iep->ie_err_cause = UNI_IE_CAUS_MISSING;
MSG_IE_ADD(msg, iep, UNI_MSG_IE_ERR);
cause = UNI_IE_CAUS_MISSING;
ATM_DEBUG0("unisig_vc_act04: no CNID in Call Proc\n");
goto response04;
}
/*
* Make sure we can handle the specified VPI and VCI
*/
if (vpi > pip->pif_maxvpi || vci > pip->pif_maxvci ||
vci < UNI_IE_CNID_MIN_VCI) {
cause = UNI_IE_CAUS_BAD_VCC;
ATM_DEBUG0("unisig_vc_act04: VPI/VCI invalid\n");
goto response04;
}
/*
* Make sure the specified VPI and VCI are not in use
*/
if (unisig_find_vpvc(usp, vpi, vci, VCC_OUT)) {
cause = UNI_IE_CAUS_NA_VCC;
ATM_DEBUG0("unisig_vc_act04: VPI/VCI in use\n");
goto response04;
}
/*
* Start timer T310
*/
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T310);
/*
* Save the specified VPI and VCI
*/
uvp->uv_vpi = vpi;
uvp->uv_vci = vci;
/*
* Set the state
*/
uvp->uv_sstate = UNI_CALL_OUT_PROC;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
response04:
/*
* Initiate call clearing
*/
rc = unisig_vc_clear_call(usp, uvp, msg, cause);
return(rc);
}
/*
* VC state machine action 5
* Timeout in UNI_CALL_OUT_PROC
*
* Clear call towards network
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act05(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
struct unisig_msg *rls_msg;
struct ie_generic *cause_ie;
/*
* Send a RELEASE message
*/
rls_msg = (struct unisig_msg *) atm_allocate(&unisig_msgpool);
if (rls_msg == NULL)
return(ENOMEM);
cause_ie = (struct ie_generic *) atm_allocate(&unisig_iepool);
if (cause_ie == NULL) {
atm_free(rls_msg);
return(ENOMEM);
}
/*
* Fill out the RELEASE message
*/
rls_msg->msg_call_ref = uvp->uv_call_ref;
rls_msg->msg_type = UNI_MSG_RLSE;
rls_msg->msg_type_flag = 0;
rls_msg->msg_type_action = 0;
rls_msg->msg_ie_caus = cause_ie;
/*
* Fill out the cause IE
*/
cause_ie->ie_caus_loc = UNI_IE_CAUS_LOC_USER;
cause_ie->ie_caus_cause = UNI_IE_CAUS_TIMER;
KM_COPY("310", cause_ie->ie_caus_diagnostic, 3);
/*
* Send the RELEASE message.
*/
rc = unisig_send_msg(usp, rls_msg);
unisig_free_msg(rls_msg);
/*
* Start timer T308
*/
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T308);
/*
* Set the new state
*/
uvp->uv_sstate = UNI_RELEASE_REQUEST;
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(rc);
}
/*
* VC state machine action 6
* Received CONNECT
*
* Send CONNECT ACK, go to UNI_ACTIVE state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act06(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int cause, rc, vci, vpi;
struct atm_pif *pip = usp->us_pif;
struct unisig_msg *cack_msg;
struct ie_generic *iep;
Atm_attributes *ap;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
ap = &uvp->uv_connvc->cvc_attr;
/*
* See if a VPI/VCI is specified
*/
if (msg->msg_ie_cnid) {
/*
* Yes--VPI/VCI must be the first specification or must
* match what was specified before
*/
vpi = msg->msg_ie_cnid->ie_cnid_vpci;
vci = msg->msg_ie_cnid->ie_cnid_vci;
if ((uvp->uv_vpi || uvp->uv_vci) &&
(vpi != uvp->uv_vpi ||
vci != uvp->uv_vci)) {
cause = UNI_IE_CAUS_BAD_VCC;
ATM_DEBUG0("unisig_vc_act06: VPI/VCI invalid\n");
goto response06;
}
/*
* Specified VPI/VCI must be within range
*/
if (vpi > pip->pif_maxvpi || vci > pip->pif_maxvci ||
vci < UNI_IE_CNID_MIN_VCI) {
cause = UNI_IE_CAUS_BAD_VCC;
ATM_DEBUG0("unisig_vc_act06: VPI/VCI invalid\n");
goto response06;
}
uvp->uv_vpi = vpi;
uvp->uv_vci = vci;
} else {
/*
* No--VCI must have been specified earlier
*/
if (!uvp->uv_vci) {
iep = (struct ie_generic *)atm_allocate(
&unisig_iepool);
if (!iep)
return(ENOMEM);
iep->ie_ident = UNI_IE_CNID;
iep->ie_err_cause = UNI_IE_CAUS_MISSING;
MSG_IE_ADD(msg, iep, UNI_MSG_IE_ERR);
cause = UNI_IE_CAUS_MISSING;
ATM_DEBUG0("unisig_vc_act06: CNID missing\n");
goto response06;
}
}
/*
* Handle AAL parameters negotiation
*/
if (msg->msg_ie_aalp) {
struct ie_generic *aalp = msg->msg_ie_aalp;
/*
* AAL parameters must have been sent in SETUP
*/
if ((ap->aal.tag != T_ATM_PRESENT) ||
(ap->aal.type != aalp->ie_aalp_aal_type)) {
cause = UNI_IE_CAUS_IECONTENT;
goto response06;
}
switch (aalp->ie_aalp_aal_type) {
case UNI_IE_AALP_AT_AAL3:
/*
* Maximum SDU size negotiation
*/
if (aalp->ie_aalp_4_fwd_max_sdu == T_ATM_ABSENT)
break;
if ((ap->aal.v.aal4.forward_max_SDU_size <
aalp->ie_aalp_4_fwd_max_sdu) ||
(ap->aal.v.aal4.backward_max_SDU_size <
aalp->ie_aalp_4_bkwd_max_sdu)) {
cause = UNI_IE_CAUS_IECONTENT;
goto response06;
} else {
ap->aal.v.aal4.forward_max_SDU_size =
aalp->ie_aalp_4_fwd_max_sdu;
ap->aal.v.aal4.backward_max_SDU_size =
aalp->ie_aalp_4_bkwd_max_sdu;
}
break;
case UNI_IE_AALP_AT_AAL5:
/*
* Maximum SDU size negotiation
*/
if (aalp->ie_aalp_5_fwd_max_sdu == T_ATM_ABSENT)
break;
if ((ap->aal.v.aal5.forward_max_SDU_size <
aalp->ie_aalp_5_fwd_max_sdu) ||
(ap->aal.v.aal5.backward_max_SDU_size <
aalp->ie_aalp_5_bkwd_max_sdu)) {
cause = UNI_IE_CAUS_IECONTENT;
goto response06;
} else {
ap->aal.v.aal5.forward_max_SDU_size =
aalp->ie_aalp_5_fwd_max_sdu;
ap->aal.v.aal5.backward_max_SDU_size =
aalp->ie_aalp_5_bkwd_max_sdu;
}
break;
}
}
/*
* Get memory for a CONNECT ACK message
*/
cack_msg = (struct unisig_msg *) atm_allocate(&unisig_msgpool);
if (cack_msg == NULL)
return(ENOMEM);
/*
* Fill out the CONNECT ACK message
*/
cack_msg->msg_call_ref = uvp->uv_call_ref;
cack_msg->msg_type = UNI_MSG_CACK;
cack_msg->msg_type_flag = 0;
cack_msg->msg_type_action = 0;
/*
* Send the CONNECT ACK message
*/
rc = unisig_send_msg(usp, cack_msg);
unisig_free_msg(cack_msg);
/*
* Set the new state
*/
uvp->uv_sstate = UNI_ACTIVE;
uvp->uv_ustate = VCCU_OPEN;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
/*
* Notify the user that the connection is now active
*/
atm_cm_connected(uvp->uv_connvc);
return(0);
response06:
/*
* Initiate call clearing
*/
rc = unisig_vc_clear_call(usp, uvp, msg, cause);
return(rc);
}
/*
* VC state machine action 7
* Abort routine called or signalling SAAL session reset while in
* one of the call setup states
*
* Clear the call, send RELEASE COMPLETE, notify the user.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act07(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Send a RELEASE COMPLETE message rejecting the connection
*/
rc = unisig_send_release_complete(usp, uvp, msg,
UNI_IE_CAUS_TEMP);
/*
* Clear the call VCCB
*/
uvp->uv_sstate = UNI_FREE;
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
/*
* Notify the user
*/
if ((msg != NULL) && (msg->msg_ie_caus != NULL))
unisig_cause_attr_from_ie(&uvp->uv_connvc->cvc_attr,
msg->msg_ie_caus);
else
unisig_cause_attr_from_user(&uvp->uv_connvc->cvc_attr,
T_ATM_CAUSE_NORMAL_CALL_CLEARING);
atm_cm_cleared(uvp->uv_connvc);
return(rc);
}
/*
* VC state machine action 8
* Received SETUP
*
* Check call paramaters, notify user that a call has been received,
* set UNI_CALL_PRESENT state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act08(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int cause = 0, rc, vpi, vci;
struct atm_pif *pip = usp->us_pif;
struct atm_nif *nip;
Atm_addr_nsap *nap;
Atm_attributes attr;
ATM_DEBUG3("unisig_vc_act08: usp=%p, uvp=%p, msg=%p\n",
usp, uvp, msg);
/*
* Make sure that the called address is the right format
*/
if (msg->msg_ie_cdad->ie_cdad_plan != UNI_IE_CDAD_PLAN_NSAP) {
cause = UNI_IE_CAUS_IECONTENT;
ATM_DEBUG0("unisig_vc_act08: bad address format\n");
goto response08;
}
/*
* Make sure that the called address is ours
*/
nap = (Atm_addr_nsap *) msg->msg_ie_cdad->ie_cdad_addr.address;
if (bcmp(usp->us_addr.address, nap, /* XXX */
sizeof(Atm_addr_nsap)-1)) {
cause = UNI_IE_CAUS_IECONTENT;
ATM_DEBUG0("unisig_vc_act08: address not mine\n");
goto response08;
}
/*
* Find the right NIF for the given selector byte
*/
nip = pip->pif_nif;
while (nip && nip->nif_sel != nap->aan_sel) {
nip = nip->nif_pnext;
}
if (!nip) {
cause = UNI_IE_CAUS_IECONTENT;
ATM_DEBUG0("unisig_vc_act08: bad selector byte\n");
goto response08;
}
/*
* See if we recognize the specified AAL
*/
if (msg->msg_ie_aalp->ie_aalp_aal_type != UNI_IE_AALP_AT_AAL3 &&
msg->msg_ie_aalp->ie_aalp_aal_type !=
UNI_IE_AALP_AT_AAL5) {
cause = UNI_IE_CAUS_UAAL;
ATM_DEBUG0("unisig_vc_act08: bad AAL\n");
goto response08;
}
/*
* Should verify that we can handle requested
* connection QOS
*/
/*
* Make sure the specified VPI/VCI is valid
*/
vpi = msg->msg_ie_cnid->ie_cnid_vpci;
vci = msg->msg_ie_cnid->ie_cnid_vci;
if (vpi > pip->pif_maxvpi ||
vci > pip->pif_maxvci ||
vci < UNI_IE_CNID_MIN_VCI) {
cause = UNI_IE_CAUS_BAD_VCC;
ATM_DEBUG0("unisig_vc_act08: VPI/VCI invalid\n");
goto response08;
}
/*
* Make sure the specified VPI/VCI isn't in use already
*/
if (unisig_find_vpvc(usp, vpi, vci, VCC_IN)) {
cause = UNI_IE_CAUS_NA_VCC;
ATM_DEBUG0("unisig_vc_act08: VPI/VCI in use\n");
goto response08;
}
/*
* Make sure it's a point-to-point connection
*/
if (msg->msg_ie_bbcp->ie_bbcp_conn_config !=
UNI_IE_BBCP_CC_PP) {
cause = UNI_IE_CAUS_NI_BC;
ATM_DEBUG0("unisig_vc_act08: conn not pt-pt\n");
goto response08;
}
/*
* Fill in the VCCB fields that we can at this point
*/
uvp->uv_type = VCC_SVC | VCC_IN | VCC_OUT;
uvp->uv_proto = pip->pif_sigmgr->sm_proto;
uvp->uv_sstate = UNI_CALL_PRESENT;
uvp->uv_ustate = VCCU_POPEN;
uvp->uv_pif = pip;
uvp->uv_nif = nip;
uvp->uv_vpi = msg->msg_ie_cnid->ie_cnid_vpci;
uvp->uv_vci = msg->msg_ie_cnid->ie_cnid_vci;
uvp->uv_tstamp = time_second;
/*
* Copy the connection attributes from the SETUP message
* to an attribute block
*/
KM_ZERO(&attr, sizeof(attr));
attr.nif = nip;
attr.aal.tag = T_ATM_ABSENT;
attr.traffic.tag = T_ATM_ABSENT;
attr.bearer.tag = T_ATM_ABSENT;
attr.bhli.tag = T_ATM_ABSENT;
attr.blli.tag_l2 = T_ATM_ABSENT;
attr.blli.tag_l3 = T_ATM_ABSENT;
attr.llc.tag = T_ATM_ABSENT;
attr.called.tag = T_ATM_ABSENT;
attr.calling.tag = T_ATM_ABSENT;
attr.qos.tag = T_ATM_ABSENT;
attr.transit.tag = T_ATM_ABSENT;
attr.cause.tag = T_ATM_ABSENT;
unisig_save_attrs(usp, msg, &attr);
/*
* Notify the connection manager of the new VCC
*/
ATM_DEBUG0("unisig_vc_act08: notifying user of connection\n");
rc = atm_cm_incoming((struct vccb *)uvp, &attr);
if (rc)
goto response08;
/*
* Wait for the connection recipient to issue an accept
* or reject
*/
return(0);
response08:
ATM_DEBUG1("unisig_vc_act08: reject with cause=%d\n", cause);
/*
* Clear the VCCB state
*/
uvp->uv_sstate = UNI_NULL;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
/*
* Some problem was detected with the request. Send a Q.2931
* message rejecting the connection.
*/
rc = unisig_send_release_complete(usp, uvp, msg, cause);
return(rc);
}
/*
* VC state machine action 9
* Accept routine called by user
*
* Send CONNECT, start timer T313, go to UNI_CONNECT_REQUEST state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act09(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
struct unisig_msg *conn_msg;
conn_msg = (struct unisig_msg *) atm_allocate(&unisig_msgpool);
if (conn_msg == NULL)
return(ENOMEM);
/*
* Fill out the response
*/
conn_msg->msg_call_ref = uvp->uv_call_ref;
conn_msg->msg_type = UNI_MSG_CONN;
conn_msg->msg_type_flag = 0;
conn_msg->msg_type_action = 0;
/*
* Send the CONNECT message. If the send fails, the other
* side will eventually time out and close the connection.
*/
rc = unisig_send_msg(usp, conn_msg);
unisig_free_msg(conn_msg);
if (rc) {
return(rc);
}
/*
* Start timer T313
*/
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T313);
/*
* Set the new state
*/
uvp->uv_sstate = UNI_CONNECT_REQUEST;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
}
/*
* VC state machine action 10
* Received CONNECT ACK
*
* Go to UNI_ACTIVE state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act10(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Set the state
*/
uvp->uv_sstate = UNI_ACTIVE;
uvp->uv_ustate = VCCU_OPEN;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
/*
* Notify the user that the call is up
*/
atm_cm_connected(uvp->uv_connvc);
return (0);
}
/*
* VC state machine action 11
* Reject handler called
*
* Send RELEASE COMPLETE, clear the call
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act11(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc, cause;
/*
* Send generic cause code if one is not already set
*/
if (uvp->uv_connvc->cvc_attr.cause.tag == T_ATM_PRESENT)
cause = T_ATM_ABSENT;
else
cause = T_ATM_CAUSE_CALL_REJECTED;
/*
* Send a RELEASE COMPLETE message
*/
rc = unisig_send_release_complete(usp, uvp, msg, cause);
/*
* Clear the call VCCB
*/
uvp->uv_sstate = UNI_FREE;
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(rc);
}
/*
* VC state machine action 12
* Release or abort routine called
*
* Send RELEASE, start timer T308, go to UNI_RELEASE_REQUEST state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act12(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Send the RELEASE message
*/
rc = unisig_vc_clear_call(usp, uvp, (struct unisig_msg *)NULL,
T_ATM_ABSENT);
return(rc);
}
/*
* VC state machine action 13
* RELEASE COMPLETE received
*
* Clear the call
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act13(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Set the state
*/
uvp->uv_sstate = UNI_FREE;
if (uvp->uv_ustate != VCCU_ABORT)
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
/*
* Notify the user that the call is now closed
*/
if (msg->msg_ie_caus != NULL)
unisig_cause_attr_from_ie(&uvp->uv_connvc->cvc_attr,
msg->msg_ie_caus);
atm_cm_cleared(uvp->uv_connvc);
return(0);
}
/*
* VC state machine action 14
* Timer expired while waiting for RELEASE COMPLETE
*
* If this is the second expiration, just clear the call. Otherwise,
* retransmit the RELEASE message and restart timer T308.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act14(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Check the retry count
*/
if (uvp->uv_retry) {
/*
* Clear the connection
*/
rc = unisig_clear_vcc(usp, uvp,
T_ATM_CAUSE_NORMAL_CALL_CLEARING);
} else {
/*
* Increment the retry count
*/
uvp->uv_retry++;
/*
* Resend the RELEASE message
*/
rc = unisig_send_release(usp, uvp,
(struct unisig_msg *)0, T_ATM_ABSENT);
if (rc)
return(rc);
/*
* Restart timer T308
*/
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T308);
}
return(0);
}
/*
* VC state machine action 15
* RELEASE received in UNI_ACTIVE state
*
* Send RELEASE COMPLETE, go to UNI_FREE, notify the user
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act15(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int cause, rc;
struct ie_generic *iep;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* If there was no Cause IE, flag an error
*/
if (!msg->msg_ie_caus) {
cause = UNI_IE_CAUS_MISSING;
for (iep=msg->msg_ie_err; iep; iep=iep->ie_next) {
if (iep->ie_ident == UNI_IE_CAUS &&
iep->ie_err_cause ==
UNI_IE_CAUS_IECONTENT) {
cause = UNI_IE_CAUS_IECONTENT;
}
}
if (cause == UNI_IE_CAUS_MISSING) {
iep = (struct ie_generic *)atm_allocate(
&unisig_iepool);
if (!iep)
return(ENOMEM);
iep->ie_ident = UNI_IE_CNID;
iep->ie_err_cause = UNI_IE_CAUS_MISSING;
MSG_IE_ADD(msg, iep, UNI_MSG_IE_ERR);
}
} else {
cause = UNI_IE_CAUS_NORM_UNSP;
}
/*
* Send a RELEASE COMPLETE message
*/
rc = unisig_send_release_complete(usp, uvp, msg, cause);
/*
* Set the state
*/
uvp->uv_sstate = UNI_FREE;
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
/*
* Notify the user that the call is cleared
*/
if (msg->msg_ie_caus != NULL)
unisig_cause_attr_from_ie(&uvp->uv_connvc->cvc_attr,
msg->msg_ie_caus);
else
unisig_cause_attr_from_user(&uvp->uv_connvc->cvc_attr,
T_ATM_CAUSE_UNSPECIFIED_NORMAL);
atm_cm_cleared(uvp->uv_connvc);
return(rc);
}
/*
* VC state machine action 16
* RELEASE received in UNI_RELEASE_REQUEST state
*
* Clear the call
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act16(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Clear the VCCB
*/
rc = unisig_clear_vcc(usp, uvp, T_ATM_ABSENT);
return(rc);
}
/*
* VC state machine action 17
* Protocol error
*
* Send a STATUS message with cause 101, "message not compatible with
* call state"
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act17(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
ATM_DEBUG3("unisig_vc_perror: usp=%p, uvp=%p, msg=%p\n",
usp, uvp, msg);
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Send a STATUS message
*/
rc = unisig_send_status(usp, uvp, msg, UNI_IE_CAUS_STATE);
return(rc ? rc : EINVAL);
}
/*
* VC state machine action 18
* Signalling AAL connection has been lost
*
* Start timer T309. If the timer expires before the SAAL connection
* comes back, the VCC will be cleared.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act18(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Start timer T309
*/
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T309);
/*
* Set new state
*/
uvp->uv_sstate = UNI_SSCF_RECOV;
return(0);
}
/*
* VC state machine action 19
* Ignore the event
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act19(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
return(0);
}
/*
* VC state machine action 20
* SSCF establish indication in UNI_SSCF_RECOV state -- signalling
* AAL has come up after an outage
*
* Send STATUS ENQ to make sure we're in compatible state with other end
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act20(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
struct unisig_msg *stat_msg;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Get memory for a STATUS ENQUIRY message
*/
stat_msg = (struct unisig_msg *)atm_allocate(&unisig_msgpool);
if (stat_msg == NULL)
return(ENOMEM);
/*
* Fill out the message
*/
stat_msg->msg_call_ref = uvp->uv_call_ref;
stat_msg->msg_type = UNI_MSG_SENQ;
stat_msg->msg_type_flag = 0;
stat_msg->msg_type_action = 0;
/*
* Send the STATUS ENQUIRY message
*/
rc = unisig_send_msg(usp, stat_msg);
unisig_free_msg(stat_msg);
/*
* Return to active state
*/
uvp->uv_sstate = UNI_ACTIVE;
return(rc);
}
/*
* VC state machine action 21
* STATUS received
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection (may
* be NULL)
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act21(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int cause, rc;
/*
* Ignore a STATUS message with the global call reference
*/
if (GLOBAL_CREF(msg->msg_call_ref)) {
return(0);
}
/*
* If the network thinks we're in NULL state, clear the VCC
*/
if (msg->msg_ie_clst->ie_clst_state == UNI_NULL) {
if (uvp) {
(void)unisig_clear_vcc(usp, uvp,
T_ATM_CAUSE_DESTINATION_OUT_OF_ORDER);
}
return(0);
}
/*
* If we are in NULL state, send a RELEASE COMPLETE
*/
if (!uvp || (uvp->uv_sstate == UNI_FREE) ||
(uvp->uv_sstate == UNI_NULL)) {
rc = unisig_send_release_complete(usp,
uvp, msg, UNI_IE_CAUS_STATE);
return(rc);
}
/*
* If the reported state doesn't match our state, close the VCC
* unless we're in UNI_RELEASE_REQUEST or UNI_RELEASE_IND
*/
if (msg->msg_ie_clst->ie_clst_state != uvp->uv_sstate) {
if (uvp->uv_sstate == UNI_RELEASE_REQUEST ||
uvp->uv_sstate == UNI_RELEASE_IND) {
return(0);
}
rc = unisig_clear_vcc(usp, uvp,
T_ATM_CAUSE_MESSAGE_INCOMPATIBLE_WITH_CALL_STATE);
}
/*
* States match, check for an error on one of our messages
*/
cause = msg->msg_ie_caus->ie_caus_cause;
if (cause == UNI_IE_CAUS_MISSING ||
cause == UNI_IE_CAUS_MTEXIST ||
cause == UNI_IE_CAUS_IEEXIST ||
cause == UNI_IE_CAUS_IECONTENT ||
cause == UNI_IE_CAUS_STATE) {
ATM_DEBUG2("unisig_vc_act21: error %d on message 0x%x\n",
cause,
msg->msg_ie_caus->ie_caus_diagnostic[0]);
if (uvp) {
(void)unisig_clear_vcc(usp, uvp, cause);
}
}
return(0);
}
/*
* VC state machine action 22
* Received STATUS ENQ
*
* Send STATUS with cause 30 "response to STATUS ENQUIRY" and
* current state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection (may
* be NULL)
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act22(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
struct unisig_msg *status;
struct ie_generic *callst_ie, *cause_ie;
ATM_DEBUG3("unisig_vc_perror: usp=%p, uvp=%p, msg=%p\n",
usp, uvp, msg);
/*
* Get memory for a STATUS message
*/
status = (struct unisig_msg *) atm_allocate(&unisig_msgpool);
if (status == NULL)
return(ENOMEM);
callst_ie = (struct ie_generic *) atm_allocate(&unisig_iepool);
if (callst_ie == NULL) {
atm_free(status);
return(ENOMEM);
}
cause_ie = (struct ie_generic *) atm_allocate(&unisig_iepool);
if (cause_ie == NULL) {
atm_free(status);
atm_free(callst_ie);
return(ENOMEM);
}
/*
* Fill out the response
*/
if (uvp) {
status->msg_call_ref = uvp->uv_call_ref;
} else if (msg) {
if (msg->msg_call_ref & UNI_MSG_CALL_REF_RMT)
status->msg_call_ref = msg->msg_call_ref &
UNI_MSG_CALL_REF_MASK;
else
status->msg_call_ref = msg->msg_call_ref |
UNI_MSG_CALL_REF_RMT;
} else {
status->msg_call_ref = UNI_MSG_CALL_REF_GLOBAL;
}
status->msg_type = UNI_MSG_STAT;
status->msg_type_flag = 0;
status->msg_type_action = 0;
status->msg_ie_clst = callst_ie;
status->msg_ie_caus = cause_ie;
/*
* Fill out the call state IE
*/
callst_ie->ie_ident = UNI_IE_CLST;
callst_ie->ie_coding = 0;
callst_ie->ie_flag = 0;
callst_ie->ie_action = 0;
if (uvp) {
switch(uvp->uv_sstate) {
case UNI_FREE:
callst_ie->ie_clst_state = UNI_NULL;
break;
default:
callst_ie->ie_clst_state = uvp->uv_sstate;
}
} else {
callst_ie->ie_clst_state = UNI_NULL;
}
/*
* Fill out the cause IE
*/
cause_ie->ie_ident = UNI_IE_CAUS;
cause_ie->ie_coding = 0;
cause_ie->ie_flag = 0;
cause_ie->ie_action = 0;
cause_ie->ie_caus_loc = UNI_IE_CAUS_LOC_USER;
cause_ie->ie_caus_cause = UNI_IE_CAUS_SENQ;
/*
* Send the STATUS message
*/
rc = unisig_send_msg(usp, status);
unisig_free_msg(status);
return(rc);
}
/*
* VC state machine action 23
* Received ADD PARTY
*
* We don't support multipoint connections, so send an ADD PARTY REJECT
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act23(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
struct unisig_msg *apr_msg;
/*
* Get memory for the ADD PARTY REJECT message
*/
apr_msg = (struct unisig_msg *) atm_allocate(&unisig_msgpool);
if (apr_msg == NULL)
return(ENOMEM);
/*
* Fill out the message
*/
if (msg->msg_call_ref & UNI_MSG_CALL_REF_RMT)
apr_msg->msg_call_ref = msg->msg_call_ref &
UNI_MSG_CALL_REF_MASK;
else
apr_msg->msg_call_ref = msg->msg_call_ref |
UNI_MSG_CALL_REF_RMT;
apr_msg->msg_type = UNI_MSG_ADPR;
apr_msg->msg_type_flag = 0;
apr_msg->msg_type_action = 0;
/*
* Use the endpoint reference IE from the received message
*/
apr_msg->msg_ie_eprf = msg->msg_ie_eprf;
/*
* Send the ADD PARTY REJECT message
*/
rc = unisig_send_msg(usp, apr_msg);
apr_msg->msg_ie_eprf = NULL;
unisig_free_msg(apr_msg);
return(rc);
}
/*
* VC state machine action 24
* User error
*
* Return EALREADY
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act24(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
return(EALREADY);
}
/*
* VC state machine action 25
* User error
*
* Return EINVAL
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act25(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
return(EINVAL);
}
/*
* VC state machine action 26
* PVC abort
*
* The abort handler was called to abort a PVC. Clear the VCCB and
* notify the user.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act26(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Close the VCCB
*/
rc = unisig_close_vcc(usp, uvp);
if (rc)
return(rc);
/*
* Notify the user
*/
if (uvp->uv_connvc->cvc_attr.cause.tag != T_ATM_PRESENT)
unisig_cause_attr_from_user(&uvp->uv_connvc->cvc_attr,
T_ATM_CAUSE_NORMAL_CALL_CLEARING);
atm_cm_cleared(uvp->uv_connvc);
return(0);
}
/*
* VC state machine action 27
* Signalling AAL failure
*
* Change PVC state to UNI_PVC_ACT_DOWN.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act27(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
/*
* Set the state
*/
uvp->uv_sstate = UNI_PVC_ACT_DOWN;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
}
/*
* VC state machine action 28
* Signalling AAL established
*
* Set PVC state to UNI_PVC_ACTIVE.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act28(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
/*
* Set the state
*/
uvp->uv_sstate = UNI_PVC_ACTIVE;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
}
/*
* VC state machine action 29
* Protocol error
*
* Send a RELEASE COMPLETE message with cause 81, "invalid call
* reference value"
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection (may
* be NULL)
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act29(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
int rc;
/*
* Send a RELEASE COMPLETE message
*/
rc = unisig_send_release_complete(usp, uvp, msg,
UNI_IE_CAUS_CREF);
return(rc);
}
/*
* VC state machine action 30
* Release routine called while SSCF session down, or SSCF session
* reset or lost while in UNI_CALL_PRESENT
*
* Go to UNI_FREE state
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act30(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
/*
* Clear any running timer
*/
UNISIG_VC_CANCEL((struct vccb *) uvp);
/*
* Clear the call state
*/
uvp->uv_sstate = UNI_FREE;
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
}
/*
* VC state machine action 31
* Accept handler called in UNI_FREE state.
*
* The call was in UNI_CALL_PRESENT state when it was closed because
* of an SSCF failure. Return an error indication. The accept
* handler will free the VCCB and return the proper code to the
* caller.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to a UNISIG message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_act31(usp, uvp, msg)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
{
return(ENETDOWN);
}
/*
* Initiate clearing a call by sending a RELEASE message.
*
* Arguments:
* usp pointer to protocol instance block
* uvp pointer to the VCCB for the affected connection
* msg pointer to UNI signalling message that the RELEASE
* responds to (may be NULL)
* cause the reason for clearing the call; a value of
* T_ATM_ABSENT indicates that the cause code is
* in the VCC's ATM attributes block
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
unisig_vc_clear_call(usp, uvp, msg, cause)
struct unisig *usp;
struct unisig_vccb *uvp;
struct unisig_msg *msg;
int cause;
{
int rc;
/*
* Clear the retry count
*/
uvp->uv_retry = 0;
/*
* Make sure the ATM attributes block has a valid cause code,
* if needed
*/
if (cause == T_ATM_ABSENT &&
uvp->uv_connvc->cvc_attr.cause.tag !=
T_ATM_PRESENT) {
uvp->uv_connvc->cvc_attr.cause.tag = T_ATM_PRESENT;
uvp->uv_connvc->cvc_attr.cause.v.coding_standard =
T_ATM_ITU_CODING;
uvp->uv_connvc->cvc_attr.cause.v.location =
T_ATM_LOC_USER;
uvp->uv_connvc->cvc_attr.cause.v.cause_value =
usp->us_proto == ATM_SIG_UNI30 ?
T_ATM_CAUSE_UNSPECIFIED_NORMAL :
T_ATM_CAUSE_NORMAL_CALL_CLEARING;
}
/*
* Send a RELEASE message
*/
rc = unisig_send_release(usp, uvp, msg, cause);
if (rc)
return(rc);
/*
* Start timer T308
*/
UNISIG_VC_TIMER((struct vccb *) uvp, UNI_T308);
/*
* Set the VCCB state
*/
uvp->uv_sstate = UNI_RELEASE_REQUEST;
if (uvp->uv_ustate != VCCU_ABORT)
uvp->uv_ustate = VCCU_CLOSED;
/*
* Mark the time
*/
uvp->uv_tstamp = time_second;
return(0);
}
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